On the basic composition of photosensitive resin

Photosensitive resin is often used in our emerging industries. Because of its excellent characteristics, photosensitive resin is particularly popular in the market. We focus on the development of UV curing special new materials and introduce synthetic technologies from Europe, America, Japan and South Korea to raw materials. Provide you with high-quality and high-level products. Let's meet photosensitive resin today.

Photosensitive resin is also called UV resin, which means that the material used for light curing rapid prototyping is liquid light curing resin, or liquid photosensitive resin, which is mainly composed of oligomer, photoinitiator and diluent. In recent two years, photosensitive resin is being used in the emerging industry of 3D printing, which is favored and valued by the industry because of its excellent characteristics. It can be seen that as the printing material of emerging industry, photosensitive resin has a lot of advantages.

1. Photosensitive prepolymer: photosensitive prepolymer refers to a low molecular weight prepolymer that can be light cured, and its molecular weight is usually between 1000 and 5000. It is the decisive factor for the final properties of materials. The prepolymers of photosensitive resin materials mainly include acrylic esterified epoxy resin, unsaturated polyester, polyurethane and polysulfide / polyene light curing resin system.

2. Active diluent: active diluent mainly refers to low molecular weight epoxy compounds containing epoxy groups, which can participate in the curing reaction of epoxy resin and become a part of the crosslinking network structure of epoxy resin cured products.

3. Photoinitiator and photosensitizer: both photoinitiator and photosensitizer play the role of initiating polymerization in the polymerization process, but there are obvious differences between them. Photoinitiator plays the role of initiator in the reaction process, participates in the reaction itself, and is consumed in the reaction process; The photosensitizer plays the role of energy transfer, which is equivalent to the role of catalyst, and there is no consumption in the reaction process. Photoinitiators form some active substances such as free radicals or cations after absorbing light energy to initiate the reaction. The main photoinitiators include benzoin and its derivatives, acetophenone derivatives, triaryl thiobell salts and so on.